One vertex per element, one color per generator, with an edge from x to x·s.
(1,2)(3,7)(4,8)(5,6)(9,10)(11,15)(12,14)(13,16) involution — undirected(2,6)(7,8)(9,11,12,16)(10,13,14,15)(17,18,23,25)(19,24,28,32)(20,22,30,21)(26,31,29,27)(1,3,5,4)(2,7,6,8)(10,14)(11,16)(17,19)(18,24)(20,29)(21,31)(22,27)(23,28)(25,32)(26,30)(1,4,5,3)(2,8,6,7)(10,14)(11,16)(17,20,22,25,23,30,21,18)(19,26,27,24,28,29,31,32)(2,6)(7,8)(10,14)(13,15)(17,21,23,22)(18,20,25,30)(19,27,28,31)(24,26,32,29)A Cayley diagram is a choice, not a fact about the group. Another drawing of this group — in a book, or on a different generating set — may look nothing like this one.